whether that is the fact in connecticut, i don't know for sure. we have flied to address that in our law and we prohibit a person who has a mental illness to possess a firearm lawfully in the district of columbia. >> and he said the challenge is to let those continue to follow the laws while allowing them to continue to use guns. >>> coming up, dr. oz joins us with advice from parents trying to explain the tragedy to the children. . >>> following friday's horrific tragedy in connecticut, we're coming to grips with the grief and feelings of sorrow for the families in newtown as, at the same time, we're also dealing with concern for our own families. so the question many of us had in the newsroom today, how do we prepare for discussions with our children tonight about what happened? perhaps when they went to school today. not knowing about the incident and maybe had a moment of silence in school that starts questions and also, how do you talk to a fave is or -- five- year-old versus a nine-year- old. we're joined by a panel of